@SparkFun Some suggestions for next time you order more of these for stock. I love this chip, but the PCB design renders this BOB nearly impossible to use.

Pull the ground plane fill away from the screw holes. If I tighten a nut down on these, it grounds out on the fill copper because it’s too close to the holes. Don’t even fill on that side of the chip; just leave the PCB bare.

Use smaller holes. It’s only measuring up to 5A - we don’t need #6 screws for that. Holes that accommodate a 3.5mm screw terminal would be optimum because we could solder in wires or a screw terminal.

Add a couple holes for a .1 in header, like you did on the low-current version of the board. Except make sure they line up so it can go into a breadboard.

The sip and puff operations don’t have to allow air flow to work. It can just be a closed-ended tube that senses pressure change. Plug the open end with an absorbent filter and you’ve eliminated a lot of the issues with moisture. Also the ‘tube’ (doesn’t have to be a tube) could be completely sealed, with a small durable bladder of air and the user can gently bite to interact. Both could be used at the same time for different functions.

In 2003, CU student Nate Seidle blew a power supply in his dorm room and, in lieu of a way to order easy replacements, decided to start his own company. Since then, SparkFun has been committed to sustainably helping our world achieve electronics literacy from our headquarters in Boulder, Colorado.

No matter your vision, SparkFun's products and resources are designed to make the world of electronics more accessible. In addition to over 2,000 open source components and widgets, SparkFun offers curriculum, training and online tutorials designed to help demystify the wonderful world of embedded electronics. We're here to help you start something.